Lubricating device



Aprfifi 23, 1935.

J. L. CREVELING 1,998,753

LUBRICATING DEVICE" Original Filed Feb. 24, 1932 IN V EN TOR. JOHN L.Cam/4 //Vc;

Patented Apr. 23, 1935 PATENT OFFICE LUBRICATINGY DEVICE John L.Creveling,. near Tucson; Ariz., assignor to The Lubrication Corporation;South Bend, End, a corporation of Delaware Original application February24, 1932, Serial No.

Divided and this application January 15, 1934, Serial'No. 706,593

7 Claims. (Cl. 221-414) ihis invention relates to lubricating devicesand more particularly to lubricating pumps of the type employing a pumpassembly forming one unit of a lubricant dispensing apparatus or gun,the lubricant container itself being arranged to provide the other unit,the two units when combined providing acomplete and operative lubricantgun.

The very common and usual lubricant han pump or lubricant hand guncomprises a pump and a lubricant reservoir more or less integrallycomiected with the pump, the reservoir being arranged to be filled byhand or by some instrument in the nature of a paddle or scoop or thelike. Such guns are generally filled from containers in which thelubricant is supplied in bulk. The objections to such filling methodsand instrumentalities are well known.

One of the primary objects of the invention therefore is to provide alubricant pump unit capable of being associated with-an originallubricant container to provide a completely operative lubricant gun ofwhat may be termed a self loading type. The lubricant containers may betermed cartridges since they not only provide units necessary to thecompletion of the gun as a completely operative structure but dispensethe lubricant through the gun pump unit directly to the part or parts tobe lubricated.

Another object of the invention is to providea compact and relativelycheap lubricant gun including the pump unit proper and the reservoir orcartridge unit.

Still another object of the invention is to provide an efficient handoperated lubricant pump capable of producing relatively high pressures.

A further object is to provide an arrangement whereby a pump of theported cylinder type may be employed in a gun construction of thecharacter described herein without material lubricant wastage.

Still other objects, the advantages and uses of the invention andvarious species thereof should become apparent after reading thefollowing description and claims and after viewing the drawing in which:

Fig. l is a view partly in section and partly in elevation showing apreferred form of the invention, and

Fig. 2 is a View similar to that of Fig. 1, showing the position ofcertain of the parts when the lubricant container, reservoir orcartridge has been substantially emptied.

This application is a division of Creveling application Ser. #594,785filed February 24, 1932 entitled Lubricating devices.

A casing generally designated 2 is formed to provide a cylinder 3, ashoulder i and a tubular portion 5 concentric with the cylinder 3. Atube 5 6 which fo-rms'the cylinder of a pump is secured at one, end inthe portion 5 of the casing and at that end provides one abutment forone end of a coiled spring '5 which,v at its other end, abuts a collar 8secured to a hollow pump plunger 9. 10 The pump plunger ii is adapted toreciprocate in the cylinder ii within which it has a sliding fit and isretained therein against the action of spring I by the collar 8 whichabuts the inturned end ii of the portion 5 of the casing. The movementof the plunger 9 in the opposite direction may be limited by a plug 52secured in and closing the bottom end of cylinder 6.

The plug i2 may also provide a support or an abutment for the bottom ofan original or other lubricant container or cartridge is which isadapted to telescope. over the cylinder 3 with a-frictional fit when itscover (not shown) has been removed. When a container or cartridge i3 istelescoped over the cylinder 3 the lubricant is transferred to the spacewithin the cylinder 3 from which it is drawn into the pump cylinder 6through ports It on the suction stroke of the plunger 9. On a pressurestroke of the plunger 9 lubricant is forced past a spring loaded checkvalve l5 disposed in the inner end of the plunger through the hollowplunger and out of a nozzle it formed integral with the plunger.

In order to insure an even and continued flow of lubricant to the pumpcylinder until the supply of lubricant in the container is exhausted, afollower ii is disposedin the cylinder 3 and surrounds the cylinder iibut, instead of being mounted upon the cylinder 5 for sliding movementstherealong, is mounted to slide between appropriate abutments on asleeve iilwhich, in turn, is slidably mounted upon the cylinder 6. Thesleeve l8 bears upon the cylinder 6 only at one end, the remainder ofthe sleeve being spaced from the cylinder ii an appreciable though shortdistance radially thereof and over a length slightly greater(preferably) than the distance from the outer end of plug 1 2 to theside of ports [4 remote therefrom. The bottom end of sleeve I8 isprovided with slots l9 for passage of lubricant 5O therethrough and avent 2! permits the follower to move back and forth in the cylinder 3with the lubricant.

In operation, with the follower IT and sleeve l8 in the positionsillustrated in Fig. 2, (the positions occupied when a cartridge has beenemptied of lubricant), the empty cartridge is removed and a newcartridge is prepared for use. As the filled cartridge is telescopedover cylinder 3 the lubricant is transferred to the cylinder and in sodoing first slides the follower I I along the sleeve 18 from itsposition shown in Fig. 2 to its position shown in Fig. l, whereuponcontinued flow of lubricant into the cylinder causes the sleeve It! tomove to the position in which it is shown in Fig. 1. The cartridge thenbecomes a part of the gun and remains thereon until the lubricant chargehas become exhausted. The operation of the gun is believed to be obviousand therefore will not be related.

While I have illustrated and described what is to be a preferredembodiment of the invention, it is apparent that the invention issusceptible of various other embodiments bearing little if anyresemblance to that illustrated. Accordingly, I desire to be limitedonly by the spirit of the invention and the scope of the appendedclaims.

I claim:

1. In a lubricating device, a cylinder adapted to receive lubricant, aremovable container telescopically mounted over said cylinder and.forming a closure for said cylinder, a tube fixedly positioned withinand extending throughout the entire length of said cylinder, said tubehaving a passage intermediate its ends providing communication betweenits interior and said cylinder, and a tubular pump plungertelescopically and slidably mounted in said tube.

2. A lubricating device comprising, a lubricant container, a cylindertelescoped within said container, a tube having one end within saidcylinder and adjacent to the bottom of said container, said tube beingformed with an inlet passage extending laterally therethrough adjacentto said end, a closure for the rear end of said tube, a tubular pumpplunger telescoped within said tube and normally extending outwardlyfrom the forward end thereof, a sleeve surrounding said tube slidablymounted thereon and having a length greater than the distance betweensaid passage and the closed end of said tube, said sleeve being soarranged with respect to said tube as to provide free passage forlubricant in said tube inlet regardless of the position of said sleeveon said tube, and a follower surrounding said sleeve and slidablymounted thereon.

3. A lubricating pump comprising, a lubricant container, 3, tubepositioned therein and formed with an inlet passageway intermediate itsends and having the rear end closed, a sleeve surrounding said tube andslidably mounted thereon, said sleeve being so formed as to provide'free passage for lubricant in said container from the lower end of thecontainer to said tube inlet regardless of the position of said sleeveon said tube, and a follower surrounding said sleeve and slidablymounted thereon.

4. A lubricating pump comprising, a tube formed with an inlet passageextending through the tube intermediate the ends, a closure for the rearend of said tube, a tubular plunger telescoped within said tube andnormally extending forwardly from the front end thereof, a sleevesurrounding said tube and slidably mounted thereon having a lengthgreater than the distance between said passage and the closed end ofsaid tube, said sleeve being so arranged with respect to said tube as toprovide free passage for lubricant between said sleeve and said'tube tosaid inlet passageway regardless of the position of said sleeve on saidtube, and a follower surrounding said sleeve and slidably mountedthereon.

5. A lubricating pump comprising, a lubricant container, a tubepositioned within the container and formed with an inlet passagewayintermediate its ends and having the rearward end of the tube closed, asleeve surrounding said tube of greater length than the distance betweensaid inlet passageway and the closed end of the tube, said sleeve havingslidable engagement with said tube at its forward end and being spacedaway from said tube throughout the remainder of its length wherebylubricant from. the inner end of the container may pass between thesleeve and the tube to said inlet passageway, and a follower surroundingsaid sleeve and slideably mounted thereupon.

6. A lubricating pump comprising, a lubricant container, a tubepositioned within the container and formed with an inlet passagewayintermediate its ends and having the rearward end of the tube closed, apump plunger slidably mounted in said tube and having a nozzle at itsouter end, a sleeve surrounding said tube of greater length than thedistance between said inlet passageway and the closed end of the tube,said sleeve having slideable engagement with said tube at its forwardend and being spaced away from said tube throughout the remainder of itslength whereby lubricant from the inner end of the container may passbetween the sleeve of the tube to said inlet passageway, and a followersurrounding said sleeve and slideably mounted thereupon.

7. In a lubricating device, a cylinder adapted to receive lubricant, aremovable container telescopically mounted over said cylinder andforming a closure for said cylinder, a tube fixedly po sitioned withinand extending throughout the entire length of said cylinder, said tubehaving a passage intermediate its ends providing communication betweenits interior and said cylinder,

a follower piston within said cylinder surrounding said tube mounted formovement longitudinally of the cylinder and tube, and a tubular pumpplunger telescopically and slideably mounted in said tube.

JOHN L. CREVELING.

